Fix workflow indentation

Author: Felix Exner

.github/workflows/ci.yml

@@ -11,12 +11,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - uses: 'ros-industrial/industrial_ci@master'
-      env:
-        ROS_DISTRO: melodic
-        CLANG_FORMAT_CHECK: file
-        CLANG_FORMAT_VERSION: "9"
+      - uses: actions/checkout@v2
+      - uses: 'ros-industrial/industrial_ci@master'
+        env:
+          ROS_DISTRO: melodic
+          CLANG_FORMAT_CHECK: file
+          CLANG_FORMAT_VERSION: "9"
 
   build:
     runs-on: ubuntu-latest